entity framework - Injecting DbContext into Repository class library -

the projects in solution set this:

• app.data
• app.models
• app.web

in app.data, i'm using entity framework access data bunch of repositories abstract interaction it. obvious reasons, app.web reference app.data project , not entity framework.

i'm using constructor injection give controllers reference repository container looks this:

public interface idatarepository {     iuserrepository user { get; set; }     iproductrepository product { get; set; }      // ... }  public class datarepository : idatarepository {     private readonly appcontext _context;      public datarepository(appcontext context)     {         _context = context;     }      // ... } 

datarepository have appcontext object (which inherits entity framework's dbcontext) child repositories use access database.

so come problem: how use constructor injection on datarepository considering it's code library , has no entry-point? can't bootstrap appcontext in app.web because have reference entity framework project.

or doing stupid?

you can define repositoryconnection class in app.data acts wrapper context , removes need reference ef in app.web. if using ioc container can control lifetime of repositoryconnection class ensure instances of repository same context. simplified example ...

public class repositoryconnection {     private readonly appcontext _context;      public repositoryconnection()     {         _context = new appcontext();     }      public appcontext appcontext { { return _context; } } }  public class datarepository : idatarepository {     private readonly appcontext _context;      public datarepository(repositoryconnection connection)     {         _context = connection.appcontext;     }  // ... }